Δευτέρα 5 Δεκεμβρίου 2016

Perceptually salient spectrotemporal modulations for recognition of sustained musical instruments

Modulation Power Spectra include dimensions of spectral and temporal modulation that contribute significantly to the perception of musical instrument timbres. Nevertheless, it remains unknown whether each instrument's identity is characterized by specific regions in this representation. A recognition task was applied to tuba, trombone, cello, saxophone, and clarinet sounds resynthesized with filtered spectrotemporal modulations. The most relevant parts of this representation for instrument identification were determined for each instrument. In addition, instruments that were confused with each other led to non-overlapping spectrotemporal modulation regions, suggesting that musical instrument timbres are characterized by specific spectrotemporal modulations.



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Sequential stream segregation of voiced and unvoiced speech sounds based on fundamental frequency

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Publication date: Available online 5 December 2016
Source:Hearing Research
Author(s): Marion David, Mathieu Lavandier, Nicolas Grimault, Andrew J. Oxenham
Differences in fundamental frequency (F0) between voiced sounds are known to be a strong cue for stream segregation. However, speech consists of both voiced and unvoiced sounds, and less is known about whether and how the unvoiced portions are segregated. This study measured listeners’ ability to integrate or segregate sequences of consonant-vowel tokens, comprising a voiceless fricative and a vowel, as a function of the F0 difference between interleaved sequences of tokens. A performance-based measure was used, in which listeners detected the presence of a repeated token either within one sequence or between the two sequences (measures of voluntary and obligatory streaming, respectively). The results showed a systematic increase of voluntary stream segregation as the F0 difference between the two interleaved sequences increased from 0 to 13 semitones, suggesting that F0 differences allowed listeners to segregate speech sounds, including the unvoiced portions. In contrast to the consistent effects of voluntary streaming, the trend towards obligatory stream segregation at large F0 differences failed to reach significance. Listeners were no longer able to perform the voluntary-streaming task reliably when the unvoiced portions were removed from the stimuli, suggesting that the unvoiced portions were used and correctly segregated in the original task. The results demonstrate that streaming based on F0 differences occurs for natural speech sounds, and that unvoiced portions are correctly assigned to corresponding voiced portions of the speech sounds.



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Sequential stream segregation of voiced and unvoiced speech sounds based on fundamental frequency

S03785955.gif

Publication date: Available online 5 December 2016
Source:Hearing Research
Author(s): Marion David, Mathieu Lavandier, Nicolas Grimault, Andrew J. Oxenham
Differences in fundamental frequency (F0) between voiced sounds are known to be a strong cue for stream segregation. However, speech consists of both voiced and unvoiced sounds, and less is known about whether and how the unvoiced portions are segregated. This study measured listeners’ ability to integrate or segregate sequences of consonant-vowel tokens, comprising a voiceless fricative and a vowel, as a function of the F0 difference between interleaved sequences of tokens. A performance-based measure was used, in which listeners detected the presence of a repeated token either within one sequence or between the two sequences (measures of voluntary and obligatory streaming, respectively). The results showed a systematic increase of voluntary stream segregation as the F0 difference between the two interleaved sequences increased from 0 to 13 semitones, suggesting that F0 differences allowed listeners to segregate speech sounds, including the unvoiced portions. In contrast to the consistent effects of voluntary streaming, the trend towards obligatory stream segregation at large F0 differences failed to reach significance. Listeners were no longer able to perform the voluntary-streaming task reliably when the unvoiced portions were removed from the stimuli, suggesting that the unvoiced portions were used and correctly segregated in the original task. The results demonstrate that streaming based on F0 differences occurs for natural speech sounds, and that unvoiced portions are correctly assigned to corresponding voiced portions of the speech sounds.



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Sequential stream segregation of voiced and unvoiced speech sounds based on fundamental frequency

S03785955.gif

Publication date: Available online 5 December 2016
Source:Hearing Research
Author(s): Marion David, Mathieu Lavandier, Nicolas Grimault, Andrew J. Oxenham
Differences in fundamental frequency (F0) between voiced sounds are known to be a strong cue for stream segregation. However, speech consists of both voiced and unvoiced sounds, and less is known about whether and how the unvoiced portions are segregated. This study measured listeners’ ability to integrate or segregate sequences of consonant-vowel tokens, comprising a voiceless fricative and a vowel, as a function of the F0 difference between interleaved sequences of tokens. A performance-based measure was used, in which listeners detected the presence of a repeated token either within one sequence or between the two sequences (measures of voluntary and obligatory streaming, respectively). The results showed a systematic increase of voluntary stream segregation as the F0 difference between the two interleaved sequences increased from 0 to 13 semitones, suggesting that F0 differences allowed listeners to segregate speech sounds, including the unvoiced portions. In contrast to the consistent effects of voluntary streaming, the trend towards obligatory stream segregation at large F0 differences failed to reach significance. Listeners were no longer able to perform the voluntary-streaming task reliably when the unvoiced portions were removed from the stimuli, suggesting that the unvoiced portions were used and correctly segregated in the original task. The results demonstrate that streaming based on F0 differences occurs for natural speech sounds, and that unvoiced portions are correctly assigned to corresponding voiced portions of the speech sounds.



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Charlie Sheens Guide To Rooftop Proposal proposal 007

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Efficacy of the Individual Components of a Tinnitus Management Protocol

Tinnitus is a perception of sound in the ears or head in the absence of an actual physical sound. Tinnitus represents one of the most common and distressing otologic problems, and it can cause various somatic and psychological disorders that interfere with the quality of life (Yetiser et al., 2002). Approximately 12 million individuals in the United States have been diagnosed with tinnitus, of which ~1 million have severe tinnitus interfering with their daily activities (Meikle, 1997; Tyler & Baker, 1983). Various treatment methods from medications to electrical stimulation to alternative medicine have been investigated, but all have limited efficacy at present. These treatments are generally aimed at reducing or eliminating the tinnitus perception, and have been largely unsuccessful in that goal.

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Efficacy of the Individual Components of a Tinnitus Management Protocol

Tinnitus is a perception of sound in the ears or head in the absence of an actual physical sound. Tinnitus represents one of the most common and distressing otologic problems, and it can cause various somatic and psychological disorders that interfere with the quality of life (Yetiser et al., 2002). Approximately 12 million individuals in the United States have been diagnosed with tinnitus, of which ~1 million have severe tinnitus interfering with their daily activities (Meikle, 1997; Tyler & Baker, 1983). Various treatment methods from medications to electrical stimulation to alternative medicine have been investigated, but all have limited efficacy at present. These treatments are generally aimed at reducing or eliminating the tinnitus perception, and have been largely unsuccessful in that goal.

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Efficacy of the Individual Components of a Tinnitus Management Protocol

Tinnitus is a perception of sound in the ears or head in the absence of an actual physical sound. Tinnitus represents one of the most common and distressing otologic problems, and it can cause various somatic and psychological disorders that interfere with the quality of life (Yetiser et al., 2002). Approximately 12 million individuals in the United States have been diagnosed with tinnitus, of which ~1 million have severe tinnitus interfering with their daily activities (Meikle, 1997; Tyler & Baker, 1983). Various treatment methods from medications to electrical stimulation to alternative medicine have been investigated, but all have limited efficacy at present. These treatments are generally aimed at reducing or eliminating the tinnitus perception, and have been largely unsuccessful in that goal.

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